Cisco VPN Configuration Guide by Harris Andrea

By Harris Andrea

Cisco VPN Configuration advisor: step by step Configuration of Cisco VPNs for ASA and Routers develop into knowledgeable in Cisco VPN applied sciences with this sensible and accomplished configuration consultant. how one can configure IPSEC VPNs (site-to-site, hub-and-spoke, distant access), SSL VPN, DMVPN, GRE, VTI and so forth. This publication is jam-packed with step by step configuration tutorials and actual international situations to enforce VPNs on Cisco ASA Firewalls (v8.4 and above and v9.x) and on Cisco Routers. it's full of uncooked sensible ideas, round forty community diagrams to give an explanation for the situations, troubleshooting directions, 20 entire configurations on real units and lots more and plenty extra. either novices and specialists will locate a few golden nuggets within this functional consultant. each Cisco Networking specialist during this planet must configure a few type of VPN ultimately in his/her expert occupation. This VPN advisor, for that reason, can be an excellent reference for years yet to come. a number of the subject matters coated comprise the subsequent: Policy-Based (IPSEC) and Route-Based VPNs (Comparison and Applications). useful functions of every VPN expertise. Configuration of Site-to-Site, Hub-and-Spoke and distant entry IPSEC VPNs on Cisco Routers. Configuration of Route-Based VPNs utilizing GRE, Static VTI, Dynamic VTI. Configuration of Dynamic Multipoint VPN (DMVPN) on Cisco Routers. Configuration of PPTP VPNs on Cisco Routers. Configuration of Site-to-Site and Hub-and-Spoke IPSEC VPNs (including IKEv2 IPSEC) on Cisco ASA Firewalls. Configuration of distant entry IPSEC VPN and Anyconnect SSL VPN on Cisco ASA Firewalls. VPN Authentication utilizing lively listing, RSA Server and exterior AAA Server. PLUS even more

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Supports unicast and multicast traffic in the VPN tunnels.  Supported only on Cisco Routers. 31 Enjoy  DMVPN is also ideal if you have VoIP running in your sites. The direct branch-to-branch communication allowed by DMVPN reduces latency and jitter thus improving network performance and VoIP quality.  DMVPN supports also remote branch sites that receive a dynamic public IP address from the ISP. No need to have static public IP address for the remote branches. 32 Enjoy Chapter 2 VPN Configuration on Cisco Routers In this Chapter we are getting into more technical details of VPN configuration.

1 Site-to-Site IPSEC VPN This is the simplest form of traditional IPSEC VPN configuration. Since this is the first configuration we are going to describe, and because it’s the base of other IPSEC implementations that we are going to see later on, we will describe this configuration in step-by-step details. In our example network topology shown above, we have two sites that we want to connect through the Internet with an IPSEC VPN tunnel. LAN-1 and LAN-2 will be able to communicate securely over the Internet.

7. Important Points to Remember:  As you have seen above, in Route-Based VPNs there is no need to define Interesting Traffic using ACLs as we did in Policy-Based VPNs.  Instead of defining which Interesting Traffic will be encrypted, configure static (or dynamic) routing to tell the router that the remote LAN network will be reachable via the other-end of the GRE Tunnel Interface. All traffic routed through the Tunnel Interface will be placed in the VPN and also protected by IPSEC. That’s why we call this VPN type as “Route-Based” VPN.

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